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Dec 19/24 PionLT/KaonLT Analysis Meeting Notes
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----------------------------------------------
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(Notes by GH)
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Today: KaonLT will be discussed first
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Present
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-------
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Regina - Garth Huber, Nathan Heinrich, Ali Usman, Nacer Hamdi, Vijay Kumar
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JLab - Dave Gaskell
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CUA - Tanja Horn
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Virginia - Richard Trotta
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FIU - Pete Markowitz
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Vijay
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-----
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Setting up for Q2=0.42 L/T-separations
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- setting up the analysis code, most things done
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- keeping the code in different places for Q2=0.38, 0.42
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- not yet pushed to GitHub
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https://github.com/vijay253/lt_analysis/tree/winter_2023
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- most data replayed, had timeout error for some runs, submitting jobs for
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these by hand
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Richard
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-------
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Q2=3.0, W=3.14, SHMS center only LT-separations
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- Data/MC ratios now closer to 1, but oscillations between 0.7-1.3
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- made changes to iteration script
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- not dividing out the W-dependence, fitting full yield including W-dep
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- Bill (and GH pi- analysis) had divided out the W-dependence to reduce the
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dynamic range of the yields, so iterations would be more stable
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- with the W-dependence in, now hitting more local min/max in chi-square
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optimization, makes iteration process more complicated
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- GH; do you fix any parameters and fit a smaller set (i.e. for sigT fix p7-p9
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and fit just p5-p6, then after p5-p6 optimized go back and fit p7-p9 in an
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repetitive process?)
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- Richard: no, but can do this going forward
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- L,T,LT seem to have correct functional form now, still trying to find a good
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function for TT
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- pi+ contamination in lowest t-bin has been corrected
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- sigT still has steep rise at lowest t-bin, but not as steep as before
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- shows MMk plot for high epsilon, center SHMS
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Nacer
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-----
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KaonLT Heep Singles analysis
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- testing different boiling factors
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- Mack: 2.5%/100uA (scaler)
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- Vijay: 5.3%/100uA (track)
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- Richard: 7.9%/100uA (track)
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- only did test for HMS/SHMS singles, SHMS 10.6 is still high
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- hopefully Nathan's Lumi analysis will settle issue of what is the correct
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boiling factor to use
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Next steps:
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- will start moving back to K+ production data
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- all data replayed
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- shows MMk for low epsilon, center SHMS setting
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- region underneath Lambda peak is fairly flat
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- GH: try comparing Lambda, Sigma SIMC distributions to the data
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Ali
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---
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No report, working on thesis
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Alicia
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------
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Info given by GH in her absence
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- made good progress on Geant4 simulation for proton abs correction
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- an issue still with S2 quartz plane, will try switching physics process to
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Cherenkov
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- hoping to have results within a week of returning from New Brunswick
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Nathan
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------
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Reports done for grad class, will return to Lumi analysis
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- will be able to make a decent set of boiling plots soon (see Nacer's
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discussion)
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Next Meeting
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-------------
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- Thur Jan 2 @ 16:00 Eastern/15:00 Regina
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- PionLT will go first
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- main agenda item will be to review first drafts of slides by Richard,
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Vijay, Ali
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